CFLib.org – Common Function Library Project

Description:
Only allow the ASCII text characters (33 to 126) for a certain string, you can also give a list of character numbers for the characters you also want to deny in the string.

Return Values:
Returns a boolean.

Example:

<cfset str = "ci.rcle">
<cfset denylist = "44,46,59,64,124">
<cfoutput>
    #CheckAsc(str,denylist)#
</cfoutput>

Parameters:

Full UDF Source:

<cfscript>
/**
 * Only allow ASCII text string.
 * 
 * @param str 	 String to check. (Required)
 * @param denylist 	 Additional list of codes to deny. (Optional)
 * @return Returns a boolean. 
 * @author Tjarko Rikkerink (&#116;&#106;&#97;&#114;&#107;&#111;&#64;&#100;&#105;&#116;&#97;&#100;&#114;&#101;&#115;&#46;&#99;&#111;&#109;) 
 * @version 1, September 23, 2004 
 */
function checkAsc(str){ 
	var i = 1;
	var nr = "";
	var denylist = "";
		
	if(arrayLen(arguments) gte 2) denylist = arguments[2];
	while (i LTE len(str)) { 
		nr = asc(mid(str,i,1)); 
		if (nr LT 33 OR nr GT 126 OR listFind(denylist,nr)){
			return false;
		} 
		i = i + 1; 
	} 

	return true; 
}
</cfscript>